diff --git a/sdks/uniswapx-sdk/src/constants.test.ts b/sdks/uniswapx-sdk/src/constants.test.ts
index bb825720..478b417c 100644
--- a/sdks/uniswapx-sdk/src/constants.test.ts
+++ b/sdks/uniswapx-sdk/src/constants.test.ts
@@ -24,6 +24,11 @@ describe("REACTOR_ADDRESS_MAPPING", () => {
           "Dutch_V2": "0x0000000000000000000000000000000000000000",
           "Relay": "0x0000000000A4e21E2597DCac987455c48b12edBF",
         },
+        "42161": Object {
+          "Dutch": "0x0000000000000000000000000000000000000000",
+          "Dutch_V2": "0x1bd1aAdc9E230626C44a139d7E70d842749351eb",
+          "Relay": "0x0000000000000000000000000000000000000000",
+        },
         "5": Object {
           "Dutch": "0x6000da47483062A0D734Ba3dc7576Ce6A0B645C4",
           "Dutch_V2": "0x0000000000000000000000000000000000000000",
diff --git a/sdks/uniswapx-sdk/src/constants.ts b/sdks/uniswapx-sdk/src/constants.ts
index 5b0094ef..b2987c75 100644
--- a/sdks/uniswapx-sdk/src/constants.ts
+++ b/sdks/uniswapx-sdk/src/constants.ts
@@ -23,12 +23,14 @@ export function constructSameAddressMap<T>(
 export const PERMIT2_MAPPING: AddressMap = {
   ...constructSameAddressMap("0x000000000022d473030f116ddee9f6b43ac78ba3"),
   11155111: "0x000000000022d473030f116ddee9f6b43ac78ba3",
+  42161: "0x000000000022d473030f116ddee9f6b43ac78ba3",
   12341234: "0x000000000022d473030f116ddee9f6b43ac78ba3",
 };
 
 export const UNISWAPX_ORDER_QUOTER_MAPPING: AddressMap = {
   ...constructSameAddressMap("0x54539967a06Fc0E3C3ED0ee320Eb67362D13C5fF"),
   11155111: "0xAA6187C48096e093c37d2cF178B1e8534A6934f7",
+  42161: "0x88440407634F89873c5D9439987Ac4BE9725fea8",
   12341234: "0xbea0901A41177811b099F787D753436b2c47690E",
 };
 
@@ -36,6 +38,7 @@ export const EXCLUSIVE_FILLER_VALIDATION_MAPPING: AddressMap = {
   ...constructSameAddressMap("0x8A66A74e15544db9688B68B06E116f5d19e5dF90"),
   5: "0x0000000000000000000000000000000000000000",
   11155111: "0x0000000000000000000000000000000000000000",
+  42161: "0x0000000000000000000000000000000000000000",
   12341234: "0x8A66A74e15544db9688B68B06E116f5d19e5dF90",
 };
 
@@ -81,6 +84,11 @@ export const REACTOR_ADDRESS_MAPPING: ReactorMapping = {
     [OrderType.Dutch]: "0xD6c073F2A3b676B8f9002b276B618e0d8bA84Fad",
     [OrderType.Relay]: "0x0000000000A4e21E2597DCac987455c48b12edBF",
   },
+  42161: {
+    [OrderType.Dutch_V2]: "0x1bd1aAdc9E230626C44a139d7E70d842749351eb",
+    [OrderType.Dutch]: "0x0000000000000000000000000000000000000000",
+    [OrderType.Relay]: "0x0000000000000000000000000000000000000000",
+  },
 };
 
 // aliasing for backwards compatibility